Angus Fire manufactures monitors in Bronze, Gunmetal and high grade SS316 Stainless Steel. We do not offer monitors in Aluminium or light alloy, despite these material being light weight and low cost, as both will corrode in the presence of salt water. Likewise copper and brass are popular materials for small, low cost monitors, but both are soft metals that can be easily damaged, especially if used as the flange material.
Bronze is combination of copper, and tin. It is probably the preferred material for manufacturing monitors, particularly if they are going to be used with salt water, or in the salt laden atmosphere of a coastal location. Bronze offers excellent corrosion resistance. The advantage of a cast monitor is that very tight bends can be achieved, making them low profile and ideal for Helideck protection.
Bronze monitors should not be used in Petrochemical Complexes where there is the presence of Hydrogen Sulphide.
Stainless Steel monitors
Angus manufactures fixed monitors in 316 Stainless Steel. SS316 is generally considered the best grade of Stainless Steel for monitors since it combines excellent corrosion resistance with good welding and fabrication features. Stainless steel monitors are lighter in weight compared to the equivalent size in bronze.
Salt (Sodium Chloride) and water (H2O) can combine, especially with heat from strong sunlight or processes, to form Hydrogen Chloride. Hydrogen Chloride is also used in chemical plants for pH control and cleaning. Hydrogen Chloride attacks steel, including stainless steels such as
SS316. Where Hydrogen Chloride is present Bronze monitors are preferred.
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